Improvement in bridge-sates



lilnztrd entre @sind dtjiiirr.

JAMES D. STURGES, OF CHICAGO, ILLINOIS.

Letters Patent No. 107,119, dated September 6, 1370.

The Schedule referred to in these Letters Patent and making part of the same.

The Objectmzd Nami/rc of my In/vcation.

The first part of my invention relates to the shaft C, extending across the approach to the bridge, and

the arms or standards attached to the shaft, arranged in such a manner that, by revolving the shaft, they yare thrown up above the roal lway, and serve as a stop or gate when the bridge is open.

The second part of my invention relates to the attachments, hereafter fully described, for operating the said shaft, to raise and lower thc gate as the bridge, is opened and closed.

The third part relates to the open roadway and coverings covering the openings, so that the gate can swing up across the road, and when the gate is down the openings will be closed or covered.`

Description of the Drawing.

Figure l represents a side elevationof a bridge and gate at each end, with one gate taken in section at the lille :i: :i: in iig. 2;

Figure 2 represents a top or plan view 5 Figure 3, an c nd elevation; and

Figure 4, a longitudinal section, showing an additional lever-attachment.

General Description.

Are-presents any of thctnrn-lnidges in use.

I, the roadway approaches to the bridge.

C is a strong shatt or roller, placedbeneath the approach B, with bearings on which it revolves.

D are those hearings.

llare arms, rigidly attached to the shaft C; and

F is a cross-rail, connecting together the ends of the arms E, and extending acrossthe street.

Hare braces, bracing the arms-E, as shown, and there is also a cross-piece, I, attached to them, and extending crosswise v'of the street ol approach B. lhiscross-pieoe strikes against theunder side ot' the approach B, when the gate swings up and constitutes a stop which prevents it froin swinging too far.

J J are pivoted levers, pivoted at a a.

K is aweight, snicently heavy to turn the gate when the bridge is opened, as hereafter described.

Lis a rope or chain, -extending from the weight K over the shaft C and pulley O to the levers J. It is so connected with the shaft C as to turn it, as hereafter described, but it simply passes over the pulley 0 to change its direction, so that it will raise the ends of thc levers J P is a roller, attached to the end of the bridge in suoli a position as to operate the levers J when the bridge is closed, and close or swing down the gate.

`When the bridge is opened, the pulley or roller I being removed from the levers J, so that they can vbrate, thc weight turns the shaftG, and throws the gatenp into the positionshown in fi". 3. It may bo made to extend across the roadwayand sidewalks, and prevent people from walking off into the water, as well as teams from being driven oli.

When the bridge is closed, the wheel I strikes upon the levers J, and, depressing them, draws on thechain L, turns the shaft C, and throws the gate down into the position shown in iig. 1.

R are covers', covering the openings in the roadway, through which the arms E rise when the bridge is opened.

These covers are hinged to the gate at b, and being made wider than the openings they cover, they lay level with the roadway when the gate is down, but are swung up with lthe gate when it is raised.

My gate is silnple and cheap, and can readily be attached te any ordinary turn-bridge.

S is the ordinary rod, used for locking the bridge.

Claims.

XVhat I claim, and desire to secure by Letters Patent, is-

l. lhev'bridge-gate, consisting-of the shaft C, having attached rigidly thereto the. arms E, the arms 1G heilig made to rise by the revolution of theshalt C, substantially as and for the purpose described and shown.

2. The weight K, chain L, shaft C, and levers J, when arranged and operating substantial! y as and for the purposes specified and shown.

3. The covers R, when constructed and arranged substantially as and for the purposes set forth and Shown.

JAMES D. STURGES.

Witnesses:

'Lnwis L. OOBURN,

HEINRICH F. Banus. 

